Lifting tool



v April 11, 1944. 3 L 2,346,482.

LIFTING TOOL Filed April 20, 1943 5.2 5677 d INVENTOR.

ATTORNEYS Patented Apr. 11, 1944 UNITED STATES ATENT OFFICE LIFTING TOOL Benjamin Gold, Las Vegas, Nev.

Application April 20, 1943, Serial No. 483,805

3 Claims. (Cl. 294-89) My invention relates to the handling of concrete building blocks and the like, and has among its objects and advantages the provision of an improved block handling tool.

In the accompanying drawing:

Figure 1 is a sectional view of a building block illustrating my invention applied thereto.

Figure 2 is a face view of the tool.

Figure 3 is a sectional view along the line 3-3 of Figure 2.

Figure 4 is an end view.

Figure 5 is an end view of a roller carrier, and

Figure 6 is a perspective view of the roller.

In the embodiment of the invention selected for illustration, the tool l0 comprises a body l2 having a straight face l4 and an oppositely positioned concaved face 16. The body I2 i provided with a dovetail groove I8 extending through its bottom end 20. Figure 1 illustrates the tool I (I inserted in the cavity 22 in a building block 24.

Slidably guided in the groove I8 is a dovetail block 26, this block having an inner face 28 slidably guided on the bottom face 30 of the groove I3. To the lower end of the block 26 is attached a strap loop 32 by a screw 34. The

. loop 32 loosely encircles a roller 38 lying in engagement with the concaved face 1'6 and engageable with the inside Wall face 38 of the block' 24 to pres the face l4 of the body l2 against the opposite face 40 of the building block.

The roller 36 is provided with a circumferential groove 42 for the reception of the loop 32, so that the loop 32 may have a diameter smaller than the end margins of the roller to the end that the roller may have unrestricted contact with the block face 38.

A pull line'or wire 44 has one end attached to an eye 46 secured to the block 26, and this line extends through a bore 48 in the body 12 and is provided with apull loop 50. A handl 52 is formed at the upper end of the body l2.

In operation, the block 26 is shifted upwardly to bring the roller 38 to th narrower part of 'the body l2 and the latter is inserted in the be pressed firmly into engagement with the block face 38, so that the face I4 of the body l2 will have firm frictional engagement with the wall face 40 of the building block. A firm grip is attained regardless of the weight of the object being lifted and the handle 52 provides a convenient grip whereby the building block may be manipulated with ease.

Without further elaboration, the foregoing will so fully explain my invention, that others may. by applying current knowledge, readily adapt the same for use under various conditions of service.

I claim:

1. In a lifting device, a body having a fiat face and an opposite face of concave curvature, said body having a slot opening through and curved in conformity with the concav face, a member mounted to slide in the slot, and a wedging element secured to the slide member and disposed transversely of the slot for movement along the concave face of the body.

2. In a lifting device of the character described, an elongated body having a flat face and an opposite face formed with a longitudinal concave curvature, said body having a longitudinal slot opening through and curved in conformity with the concave face, a block mounted to slide longitudinally in the slot, said slot and sliding block being of dovetail contour in cross section, a roller attached to one end of the slide block and extending transversely of the concave face for movement along said face with the block, and means connected to the block for selectively disposing the roller in releasing position.

3. A lifting tool for building blocks having a cavity comprising a body having a first face engageable with one wall face of said cavity, said body having a second face arranged opposite to said first face and angularly related thereto, a groove intersecting said second face, a block slidably guided in said groove, a roller engaging said second face and engageable with a second face of said cavity to press the first face of said body against the contacting cavity face of the block, a bearing attached to said block rotatably supporting said roller, one end of said block bein provided with an opening, a pull means fixed to said block and extending loosely through said opening, and a grip attached to said block at said one end.

BENJAMIN GOLD. 

